import axios from 'axios'
import {Loading, Message, MessageBox, Notification} from 'element-ui'
import store from '@/store'
import {getToken} from '@/utils/auth'
import errorCode from '@/utils/errorCode'
import {blobValidate, tansParams} from '@/utils/ruoyi'
import cache from '@/plugins/cache'
import {saveAs} from 'file-saver'
import JSONBIG from 'json-bigint'

let downloadLoadingInstance
let downloadExcelLoadingInstance
// 是否显示重新登录
export let isRelogin = {show: false}

axios.defaults.headers['Content-Type'] = 'application/json;charset=utf-8'
let language = localStorage.getItem("lang");
if (!(language != null && language != "" && language != undefined)) {
  language = 'zh_CN';
} else {
  language.replace("-", "_")
}
axios.defaults.headers['locale'] = language
axios.defaults.transformResponse = [
  function (data) {
    if ('application/vnd.ms-excel' === data.type) {
      return data
    }
    const json = JSONBIG({
      storeAsString: true
    })
    const res = json.parse(data)
    return res
  }
]
// 创建axios实例
const service = axios.create({
  // axios中请求配置有baseURL选项，表示请求URL公共部分
  baseURL: process.env.VUE_APP_BASE_API,
  // 超时
  timeout: 300000
})

// 蒙版实例
let loadingInstance = null;

// request拦截器
service.interceptors.request.use(config => {
  // 如果存在则关闭
  if (loadingInstance !== null) {
    loadingInstance.close();
  }
  // 是否需要设置 token
  const isToken = (config.headers || {}).isToken === false
  // 是否需要防止数据重复提交
  const isRepeatSubmit = (config.headers || {}).repeatSubmit === false
  if (getToken() && !isToken) {
    config.headers['tm-api-token'] = getToken() // 让每个请求携带自定义token 请根据实际情况自行修改
  }
  config.headers['locale'] = 'zh'
  // 上传接口修改请求头部
  if (config.url.includes("/customer/v1/i8n/platform/import_excel")) {
    config.headers['Content-Type'] = "multipart/form-data"
  }
  // get请求映射params参数
  if (config.method === 'get' && config.params) {
    let url = config.url + '?' + tansParams(config.params)
    url = url.slice(0, -1)
    config.params = {}
    config.url = url
  }
  if (!isRepeatSubmit && (config.method === 'post' || config.method === 'put' || config.method === 'delete')) {
    if (!config.url.endsWith("/page")) {
      // 添加遮罩层
      loadingInstance = Loading.service({
        lock: true,
        text: '努力加载中！',
        spinner: 'el-icon-loading',
        background: 'rgba(0, 0, 0, 0.3)'
      });
    }
    const requestObj = {
      url: config.url,
      data: typeof config.data === 'object' ? JSON.stringify(config.data) : config.data,
      time: new Date().getTime()
    }
    const sessionObj = cache.session.getJSON('sessionObj')
    if (sessionObj === undefined || sessionObj === null || sessionObj === '') {
      cache.session.setJSON('sessionObj', requestObj)
    } else {
      const s_url = sessionObj.url                  // 请求地址
      const s_data = sessionObj.data                // 请求数据
      const s_time = sessionObj.time                // 请求时间
      const interval = 1000                         // 间隔时间(ms)，小于此时间视为重复提交
      if (s_data === requestObj.data && requestObj.time - s_time < interval && s_url === requestObj.url) {
        // 关闭loading
        if (loadingInstance !== null) {
          loadingInstance.close();
        }
        const message = '数据正在处理，请勿重复提交'
        console.warn(`[${s_url}]: ` + message)
        return Promise.reject(new Error(message))
      } else {
        cache.session.setJSON('sessionObj', requestObj)
      }
    }
  }
  return config
}, error => {
  console.log(error)
  Promise.reject(error)
})

// 响应拦截器
service.interceptors.response.use(res => {
    // 请求返回后，关闭loading
    if (loadingInstance !== null) {
      loadingInstance.close();
    }
    const spec_codes = [10030004]
    // 未设置状态码则默认成功状态
    const code = res.data.result_code || 200
    // 获取错误信息
    const msg = errorCode[code] || res.data.msg || errorCode['default']
    // 二进制数据则直接返回
    if (res.request.responseType === 'blob' || res.request.responseType === 'arraybuffer') {
      return res
    }
    if (code === 401) {
      if (!isRelogin.show) {
        isRelogin.show = true
        MessageBox.confirm('登录状态已过期，您可以继续留在该页面，或者重新登录', '系统提示', {
            confirmButtonText: '重新登录',
            cancelButtonText: '取消',
            type: 'warning'
          }
        ).then(() => {
          isRelogin.show = false
          store.dispatch('LogOut').then(() => {
            location.href = '/index'
          })
        }).catch(() => {
          isRelogin.show = false
        })
      }
      return Promise.reject('无效的会话，或者会话已过期，请重新登录。')
    } else if (code === 500) {
      Message({
        message: msg,
        type: 'error'
      })
      return Promise.reject(new Error(msg))
    } else if (spec_codes.includes(code)) {
      return res.data
    } else if (code !== 200) {
      Notification.error({
        title: msg
      })
      return Promise.reject('error')
    } else {
      return res.data
    }
  },
  error => {
    console.log('err' + error)
    let {message} = error
    if (message == 'Network Error') {
      message = '后端接口连接异常'
    } else if (message.includes('timeout')) {
      message = '系统接口请求超时'
    } else if (message.includes('Request failed with status code')) {
      message = '系统接口' + message.substr(message.length - 3) + '异常'
    }
    Message({
      message: message,
      type: 'error',
      duration: 5 * 1000
    })
    return Promise.reject(error)
  }
)

// 通用下载方法
export function download(url, params, filename, config) {
  downloadLoadingInstance = Loading.service({
    text: '正在下载数据，请稍候',
    spinner: 'el-icon-loading',
    background: 'rgba(0, 0, 0, 0.7)'
  })
  return service.post(url, params, {
    transformRequest: [(params) => {
      return tansParams(params)
    }],
    headers: {'Content-Type': 'application/x-www-form-urlencoded'},
    responseType: 'blob',
    ...config
  }).then(async (data) => {
    const isLogin = await blobValidate(data)
    if (isLogin) {
      const blob = new Blob([data])
      saveAs(blob, filename)
    } else {
      const resText = await data.text()
      const rspObj = JSON.parse(resText)
      const errMsg = errorCode[rspObj.code] || rspObj.msg || errorCode['default']
      Message.error(errMsg)
    }
    downloadLoadingInstance.close()
  }).catch((r) => {
    console.error(r)
    Message.error('下载文件出现错误，请联系管理员！')
    downloadLoadingInstance.close()
  })
}

// excel
export function downloadExcel(url, params) {
  downloadExcelLoadingInstance = Loading.service({
    text: '正在下载数据，请稍候',
    spinner: 'el-icon-loading',
    background: 'rgba(0, 0, 0, 0.7)'
  })

  return service.get(url, {
    params: params,
    responseType: 'blob'
  }).then(async (res) => {
    // 创建URL
    let url = window.URL.createObjectURL(new Blob([res.data]))
    // 插入一个a标签，隐藏，设置href属性，触发点击方法
    let link = document.createElement('a')
    link.style.display = 'none'
    link.href = url
    link.setAttribute('download', res.headers["content-disposition"].split("=")[1])
    document.body.appendChild(link)
    link.click()
    downloadExcelLoadingInstance.close()
  }).catch((r) => {
    console.log(r)
    Message.error('下载文件出现错误，请联系管理员！')
    downloadExcelLoadingInstance.close()
  })
}

export default service
